IEC 62841-4-9:2026

Overview

IEC 62841-4-9:2026 is an international standard developed by the International Electrotechnical Commission (IEC) focused on the safety requirements for battery-powered, motor-operated chain saws specifically designed for tree service. This standard applies to rechargeable chain saws with a maximum mass of 5.0 kg, including the heaviest detachable battery pack(s) but excluding the guide bar, saw chain, and chain lubricant. Chain saws under this scope are intended for professional tree service operations such as pruning and dismantling standing tree crowns and are designed to be operated using both hands, with the right hand on the rear handle and the left on the front handle.

IEC 62841-4-9:2026 does not cover:

• Chain saws powered by mains electricity or non-isolated sources
• Chain saws with integral (built-in) batteries
• Chain saws for general wood cutting as covered by IEC 62841-4-1
• Stationary, transportable, pole-mounted, or guide-plate-equipped chain saws
• Pruning saws

Key Topics

• Safety Requirements for Battery-Powered Chain Saws
  The standard addresses all relevant hazards encountered in the normal and reasonably foreseeable misuse of battery-operated chain saws used in tree service.

• Scope and Limitations
  Applies strictly to rechargeable battery-powered models under 5.0 kg, excluding a variety of other chain saw designs and applications. Only models with a maximum rated voltage of 75 V d.c. are included.

• Electrical Safety
  As these machines are not classified as class I, II, or III tools, the standard focuses on protection against electric shock between parts of opposite polarity, not traditional insulation requirements.

• Battery and Fire Risk Management
  Comprehensive evaluation of rechargeable battery packs is provided, accounting for conditions such as charging, discharging, storage, and rough use. The standard integrates all essential fire protection requirements related to the battery, so additional battery safety standards are not needed for compliance.

• Lithium-Ion Cells
  Special attention is given to the use and safety of lithium-ion battery systems, addressing risks such as fire or explosion but not transportation, toxicity, or end-user servicing.

• Testing and Marking
  Contains provisions for marking, instructions, product safety labels, mechanical strength, moisture resistance, overload protection, and sound and vibration emission measurements.

• Harmonized Reference Standards
  Utilizes international references, including requirements for insulation, hand guard dimensions, marking symbols, noise and vibration measurement, and safety labelling.

Applications

• Professional Arboriculture and Tree Services
  This standard is crucial for manufacturers and operators involved in the development, testing, and use of handheld, rechargeable chain saws in arboricultural applications. Compliance helps ensure operator safety and reliability for tasks such as pruning and dismantling tree crowns at height.

• Product Certification and Market Access
  Adherence to IEC 62841-4-9:2026 is essential for product certification processes and demonstrates that tools meet globally recognized safety criteria, which is often required for regulatory and commercial acceptance in multiple regions.

• Quality Assurance for Battery-Powered Equipment
  By following the standard, manufacturers can address key safety concerns specific to battery-powered tools, especially for lithium-ion batteries, supporting robust product design and minimizing risks related to electric shock, mechanical injury, or fire.

Related Standards

• IEC 62841-1:2014 & IEC 62841-1:2014/AMD1:2025 – General safety requirements for motor-operated hand-held tools, transportable tools, and lawn and garden machinery.
• IEC 62841-4-1 – Requirements for chain saws cutting wood (not restricted to tree service).
• IEC 62841-4-10 – Safety requirements for pole-mounted pruners.
• IEC 62133-1 & IEC 62133-2 – Safety requirements for rechargeable battery packs and lithium-ion cells during transport and general use.
• IEC 60335-2-29 – Safety standards for battery chargers.
• ISO 3744, ISO 6533, ISO 6534, ISO 9518, ISO 13772 – Covering acoustics, hand-guard dimensions, mechanical strength, kickback performance, and chain brake testing.

IEC 62841-4-9:2026 is a key reference for safety and compliance in the design, production, and use of battery-powered chain saws in professional tree service, providing a comprehensive framework to mitigate risks and align with international best practices.